An extract on #coinlinemurahbanget

The supporting structure of a roof usually comprises beams that are long and of strong, fairly rigid material such as timber, and since the mid-19th century, cast iron or steel. In countries that use bamboo extensively, the flexibility of the material causes a distinctive curving line to the roof, characteristic of Oriental architecture.
Timber lends itself to a great variety of roof shapes. The timber structure can fulfil an aesthetic as well as practical function, when left exposed to view.
Stone lintels have been used to support roofs since prehistoric times, but cannot bridge large distances. The stone arch came into extensive use in the ancient Roman period and in variant forms could be used to span spaces up to 140 feet (43 m) across. The stone arch or vault, with or without ribs, dominated the roof structures of major architectural works for about 2,000 years, only giving way to iron beams with the Industrial Revolution and the designing of such buildings as Paxton's Crystal Palace, completed 1851.
With continual improvements in steel girders, these became the major structural support for large roofs, and eventually for ordinary houses as well. Another form of girder is the reinforced concrete beam, in which metal rods are encased in concrete, giving it greater strength under tension.

Hatfield and Medley have contrasting vocal range that helped them create a distinctive sound as a duet, but also strong vocal talent individually that allowed them to perform as soloists. Medley sang the low parts with his bass-baritone voice, with Hatfield taking the higher register vocals with his countertenor voice.
They had their first hit with the 1964 song "You've Lost That Lovin' Feelin'", produced by Phil Spector and often considered one of his finest works. Other notable hits include "Ebb Tide", "Soul and Inspiration", "Rock and Roll Heaven", and in particular, their version of "Unchained Melody". Both Hatfield and Medley also had for a time their own solo careers. In 2016, Medley reformed The Righteous Brothers with Bucky Heard and they continue to perform as a duo.

Bobby Hatfield was found dead in his hotel room in Kalamazoo, Michigan, on November 5, 2003, shortly before he was due to perform at a concert with Bill Medley at Western Michigan University's Miller Auditorium. According to the autopsy report, the cause of his death was attributed to cocaine leading to heart failure. Bill Medley continues to perform as a solo artist after Hatfield's death, for a time singing with a screen projection of old filmed footage of Hatfield.